Winding mechanism



P. B. CAMP WINDING MECHANISM Filed April 24, 1924 Patents Dec. 36, 1924.

UNIT

PERCY B. CAMP, or MAYWOOD, ILLINGIS, ASSIGNOR 'ro UNIVERSAL DRAFT GEARAT- 'TACHIVIENT GOMEANY, A GOR3E0BA'IION OF ILLINOIS.

WINDING MECHANISM.

' Application filed April 24,

To all whom it may concern:

Be it known that I, PERCY B. CAMP, a citizen of the United States, andresident of Maywood, county of Cook and State of Illinois, have inventedcertain new and use ful Improvements inVVinding Mechanism, of which thefollowing is a specification, and which are illustrated in the accompanying drawings, forming a part thereof. This invention relates to windingmechanisms particularly adapted for hand brakes on railway cars, and hasfor its objects to balance the stresses in the shaft when the windingpower is being applied to the hand lever; to improve the means forreleasing the winding mechanism; and to provide a hand grip inadvantageous relationship to the hand lever to which the winding poweris applied. Further objects contributing to' the improvement of windingmechanisms will become apparent as the disclosure proceeds and thedescription is read in connection with the accompanying drawingsillustrating a selected embodiment of the invention, and in which 1 Fig.1 is a plan view showing the hand lever in winding position andindicating in dotted lines the scope of its movement in winding theshaft;

Fig. 2 is a side elevation corresponding to Fig.1, with the lever cutaway on the'line 22 of Fig.1; I r

Fig. 3 is a sectional-view taken on the line 33 of Fig. 2;

Fig. 4 isa vertical sectional view taken on the line 44 of Fig. 3;

Fig. 5 is a sectional view taken on the line 55of Fig. 4, lookingupwardly at the face of the ratchet wheel, and j I Fig. 6 isa sectionthrough the hand lever taken on the line 66 of Fig. 4.

A fragment of a car end is shown at equipped with a bracket 11 having alateral- 1y projecting arm 12 (Fig. 3) equipped with a bearing 13 inwhich the upper end of brake staff, or other shaft, 14, is journaled,the lower end of the stafi being reduced and journaled in a bracket15Vcarried by the car frame. 7 I,

The upper end of the staff is polygonal in cross section, as indicatedat 16 in 1, and receives a ratchet wheel 17 having a complementarypassage in its hub .18. A

pin or rivet 19' passes through the hub and 192.4. Serial No. 708,643.

the shaft to prevent longitudinal movement and a flange 20 on the upperend of the hub serves as 'aguard to prevent the pin from injuring theoperator when the brake staff is released after the brakes have beenset.

The ratchet wheel is equipped onto the lower surface with teeth 21arranged in continuous series and at its outer edge there is an annularlip 22 encircling the teeth and forming a shroud to protect them fromdirt and ice and to protect the operator from the teeth.

The ratchet wheel is operated by a hand lever 23 arranged to swingbetween a position at an angle to the shaft, as illustrated in Fig. 1,and in the dotted lines in Fig. 4, and an inoperative position extendingalong the shaft, as shown in solid lines in Fig. 4. The lever isbent at24 and divided into two forks 25 and 26, which straddle the shaft andare fulcrumed on a pin 46 carriedby a boss 27 on a fulcrum sleeve 28journaled on the shaft 14 and supported against longitudinal movement bya collar 29, secured to the shaft by a pin 30. I

Adjacent to the bend 24 the lever isperforated and equipped with a pawlpivoted therein on trunnions 31 with one end-32 in 7 position tocooperate with the teeth 21 and the other end 33 Weighted to urgethe end32 into such engagement when the hand lever is raised to windingposltion. The

' construction and arrangement of the lever just described causes thepawl to be brought into proper cooperative relationship with the ratchetby merely raising the lever to the dotted line position in Fig. 4.

The bracket 11 has a second arm substantially parallel to the arm 12,and a pawl 35 is pivoted. between them to engage with the teeth 21 andprevent unwinding of the staff as the hand lever is moved from theposition A in Fig. 1 towards a position B, or when the hand lever isdropped to inoperative position. This pawl takes the formof a bell crankhaving one arm 36 for engagement with the ratchet teeth 21 and anotherarm 37 adapted to be acted upon by a cam or extension 38 on the fork 25of the hand lever. (see Fig. 4). The'arm 37 has a finger 39 projectinglaterally from one side to extend the area. over which the pawl be actedapes By the hand lever.

the cam 38 will not engage the arm and the pawl 35 will continue to holdthe staff against unwinding," or in other words, to hold the brakesapplied. When the brakes are to be released, the hand lever is moved toa pos1t1on approxnnatlng that shown at B in Fig. 1 and dropped, and thecare will strike the arm 37 and free the arm from the ratchet teeth. Thepossibilities these operations is readily seen in Fig. 3.

In order to prevent the hand love. from rotating about the shaft andallowing the cam 38 to slide off the arm 37 without releasing the pawl,means are provided to limit the rotation of the shaft in both directionswhen the cam and pawl have once been engaged. The arm 12 extends downinto the path of a lug 40 on the fulcrum 28 and limits the rotation in acounterclockwise direction on Fig. 1, and a flan e, or rib, ti on thearm 87 forms a guide I01 the side of the cam 38 and prevents rotation inthe opposite direction.

The latitude allowed by these limits is sufficient to enable theoperator to readily place the lever in position to trip the pawl whenthat is desired and the arm 3?, together with the linger 89fcover anarea of corresponding latitude.

The lug 40 and the arm 12 also serve to limit the back movement of thehand lever corresponding to position B in Fig. 1.

The end of the hand lever is formed into a loop 42 to provide a securegrip for the operator. The bracket 11 is extended down wardly, asindicated at 43 in Fig. 2, and provided with a hand grip 44: on the left'side of the shaft in convenient position for the operators left hand.By this means the operator may stand on the step, grasp the grip 44 withthe left hand and the loop 42 with the right hand, and operate thebrakes with a feeling of security, and in a position that'will enablehim to use his weight and arength to the best advantage. k

The ratchet wheel 17 will protect the teeth and the pawls from fallingmaterial and from the accumulation of ice in cold. weather, thuspreserving them in operative condition a-tall times. However, whenanything goes wrong with the mechanism below the ratchet wheel theabsence of any enclosing casing makes the parts readily accessible forexamination, cleaning and repair. This is a very important advantageover winding mechanisms in which the teeth are subiect to clogging bydirt or ice, and in which a casing serves both to hamper inspection andrepair, and to collect dirt and water.

The angle or curve in the lever 24 permitsit to lie close to the. shaftin folded position and enables it to bring the pawl into proper relationto the ratchet wheel when raised to windingposition. It also permits thecam 38 to take a convenient re lation to the arm 37, allowing the latterto freely engage the ratchet duringthe wind: ing operation andthereafter to be engaged by the cam and swung to release the arm 36 fromthe teeth 21.

By placing the bearing 13 between the fulcrum sleeve 28 and the ratchet,the forces developed when power is applied to the hand lever arebalanced and the lever and shaft turn about their axes in the bearingwithout any binding or distortion.

1 claim as my invention:

l. device of the class described, the combination of a shaft, a ratchetwheel secured thereto and having teeth on its lower side, a bearing forthe shaft below the ratchet wheel. a sleeve journaled on the shaft belowthe bearing, a hand lever pivoted to the sleeve to swing between awinding position, at an angle to the shaft, and in an inoperativeposition extending along the shaft, and a pawl carried by the lever forengagement with the ratchet'wheel' when the lever is in windingposition.

2. in a device of the class described, the combination of a shaft, aratchet wheel in driving relation 'to the shaft, a hand lever adapted tobe raised to a winding position for driving the shaft and to drop bygravity to an inoperative position out ofthe way, a pawl forengagementwith the ratchet wheel to prevent unwinding of the shaft. anarm on the hand lever adapted to move the pawl to release theratchet'whe'el, and means to hold the pawl andarm in engagement.

3.111 a device of the class described. the combination of a shaft, aratchet wheel in driving relation with the shaft, a hand leveruniversally mounted with respect to the shaft and adapted to be raisedto awinding position and to drop by gravity to an inoperative position,means 'to effect a drivingengagement with the shaft when the hand leveris raised, a pawl cooperating with the ratchet wheel to preventunwinding of the shaft, an arm onthe hand. lever for releasing the pawland a flange on the pawl to hold the lever in engagement therewith.

4. In a device ofthe class described, the combination of a shaft, aratchet wheel on the shaft. 'a fulcrum member journaled on the shaftbelow the ratchet wheel, a hand lever pivoted to the fulcrum member toswing between a winding position at an angle to the shaft. and aninoperative position extending along the shaft, a pawl for effecting adriving engagement between the lever and the shaft when the former is inwinding position and a bracket for support- .ing the shaft having abearing interposed between the ratchet wheel and the fulcrum member.

5. In a device of the class described, the combination of a car end, anupright shaft, a ratchet wheel in driving engagement with the shaft, abearing beneath the ratchet wheel in which the shaft is journaled, abracket on the car end having an arm carrying said bearing, a pawlmounted on the arm and engaging the ratchet to prevent unwinding, a handlever universally mounted on the shaft below the hearing, means foreffecting a driving engagement between the ratchet wheel and the handlever when the lever is raised, and means for releasing the- 20combination of a car end, an upright shaft adjacent to the car end,means for rotating the shaft including a hand lever pivoted to swingbetween a winding position at an angle to the shaft, and an inoperativeposition extending along the shaft, a bracket carried by the car end andhaving a bearing for the shaft and a hand grip carried by the bracket atone side of the shaft.

7. In a device of the class described, the combination of a car end, abracket on the car end having a bearing therein, an upright shaft'onrnaled in the bearin means forv rotating the shaft including a handlever pivoted to swing between a winding position at an angle to theshaft and an inoperative position extending along the shaft, and a handgrip on the bracket shaft.

PERCY B. CAMP.

at the left side of the

